Mechanical damper



Sept- 2, 1930. G. DALL'oLlo cfoNTRl MECHANICAL, DAMPER Filea Feb. 2.o, 1,925 2 sheets-sheet 1 Sept; 2, 1930. G. DALL omo CONTRI MECHANICAL DAMPER Filed Feb. 20, 1925 2. Sheecs--See'c iff/f `15 to run in one sense,

Patented Sept. 193()v UNi'rEDf s'rif'E`sgyfarnu,v ogFgFifcfE; l' 4 GIOVANNI DALLOLIO CONTRI, 0F MILAN ,ITALY MECHANICAL DAMPER Application mea February zo, 1925, serial Np;1o,6e1,anain italy'v February 2o, 19.24. i

lThe object'of this invention is to provide an apparatus which may be secured onthe side sills or longitudinal beams of a vehicle and adapted VJfor absorbing theoscillationsl f 5 which generally happen in the laminated.y

vor elliptical springs after the lirst bending `caused vby shocks and vbumps to. which the wheels of a vehicle arey subjected during. the

run, the said etifect being obtained by brakingv lo the return reaction of the laminated springs.

vThe manner in which this result may be obn tainedconsists in'causing a movable dise to be subjected to the stresses of the laminated lspring in such a! manner that the disc is free other sense it will engage abody meeting with the resistance of a casing wherein the said body is enclosed and vwhich is formed integral with the longitudinal bearer, the 20 clutch between the movable part andthe body meeting with resista-nce opposed toits revolution within the said case being obtained by mea-ns of suitable springs..

A. further. object of this invention is to provide the damper for graduating the braking action with a cover to be screwed on the case and adapted to compress the rictional matter whereiny the disc isy turning and'to Lprovide moreover Jfelt paclriiigs `for ensuring tao the oil tiglitingrof the device. f

In the annexed drawing an example of the maner in whichthe invention is tobe carv-l ried out is shown. l *e j v Figure 1 is a main view ofthe device applied to a side sill. ff

Fig. 2 is apart sectional view of thev devicev *f j Figures 4, and, ,-a-f is rthe boxv secured L on the Vside' sill,th`e yexternal croivn whereot box which is more projections B. L Y place bythe projectionsB and servingas a coverfor the box A in ,such ay ma-nner'that this latter may contain a friction developing while byk running in the internal mechanical sectional lview* of n o of which belonging to the` eov erf ffii-'ffis.AVV

adapted to compress the Jrictionalniatterv Y, while the other one belonging to the j igures l, 2 kand 3, A indi-L ring -c-se'rvesjas a loclriiutfforthe cover* xed on the side sillyby 1 v means of a bolt N and provided with three or` J isA a disc heldv .inY

ymeans C formed of felt or like material. indicates a recessed friction element or disk of metal merging into the frictional matter and H a central lcore which may becoupled j i with the disc by means of rolls Ecooperating v f tral core H; Gf Vis an adjustment nut screwed 'for locking more or less the pressure cap Foi lon therotating pin of the core H and serving the cover L inzorder to render more or 'less 1 compact therietional matter C thus varying the rictional pressure of the disc D; the lever l through the tie-*rod R rests upon tlie laminated spring S weighing down on the axle of the running wheel.

`-When'tlie laminated vehicle springsis coinpressed, the lever I is moved upwardly, thus causing the core to be rotated in a counterclockwise direction, Fig. Q, the rOllsE mov-` ing to inoperative positionand permitting substantially unrestrained compression of the y spring S. i l

f, Oii'the contrary, when the" vlaminated spring reacts and performsits return movefment, the core iny turning vfrom .tlieleft to-` the right y'is coupled with thedisfcv'by means' of the rolls E, andwthedisc byt'rictionally turning with the trictional matter brakes the return movement off the spring, the adjust-k mentgnutfG servingto axially `displace the cover Lwhicliis Aguided'by the projections ',Bvwliicli in the Sametime prevent the rotation thereof.

According ,to tli'e'modiiication shown .in

is formed `'with two opposedthreads the one couplingrolls guided' by :thefspring "p`ress`ed pin-'Jr- ,fthe said rolls aifef enclosed .;eusj the .internal boxfcoviitaining the ico rbox and beingn formed by the core and the of decreasingcross section; -pis 'the lubricating piping, 4.7- indi- Within cavities "cate 'felt mcliine's for oil tin'htinfr mis U 2D i117 the oilcr, n is e graduated plate whereon may be read the indications roi e' pointer -Q- relative 'to the braking amount vecc'ordl lng to tliehiglieror lower pressure of the cover f-"-d -0- 'indicare sind bolts for securingy ythe device on the longitudinal bearer.

The Working of the device isthe same as fromthe right torheleft and the' rolls lq-- eceommodel Y therecess in the fri be-ing squeezed between ;L-V and etend to carry chie lu't'er towards the resistance opposed by the'cover eliwith the nid ci? the friet-ione] matter M41 in this manner 4fribrak-ing fiction oi the spring' will be obtained the 'amount whereof will depend pre-V ycisely upon thel degree of threading of the Cover on the external box -e-.

kIt is gto lbe understood Vthat lthe particulars 0f structure und shape may very in the prac- `tice Withregnrd .to'those described and shown on the accompzuiyingr drawings Without eX! ceeding` Jolie boundaries of this invention. Having now particularlydescribed and ascertained the nature of my invention und in what` `ine-nner the saine ie to be performed, I f

decl-ire 11h et vvhntl claim is :V

1. A shock ebsorberiincluding n casing, L cover edjustnbleonsaid casing, e -roreteb-le member jonrnel'led ineeid casing, a recessed friction lelement movable ii `vaid casing; and

meinbelgi soi igf'conrrolled clurchingY elements on che periphery of the' portion ol: the roatable member which is accommodated in lion element and guided by the recessed friction element, and .friction developing means on opposite sides of `the frictionfelen'ient .und coaching with thev casingand cover. f 1 Y 2; A shock absorber includino e, ce1-sine'v n -f stud arranged centrnl lyV therein, a member lroe tatableonfthe stud and provided with ldisc like extension rec ed at suiiable intervals `on 'the periphery5 a. two-pert friction-element Imova'bl'e in the easing' including n sectional bmeans; ecconnnodated Within the "casing, i

metallic member loosely mounted aboutv the f rotatable menilrer and provided with a recess for accommodatingfthe disc like extension or therotateble member, -friction developing Yspring pres-sed clutching rollers mountediin fthe recesses*oi"I the disc like extension'and housed in the recess off the two-part metallic port-ion oli the rete'telble.

member and `@,juided thereby, a cover for the easing and means for adjusting the relation of the ycover With respect to the casing to consequently very the frictionzil engagemen betweenv the casing and its cover' and the friction developing means.

GIOVANNI DALLOIJIO CONTRI. 

